Numerical modeling and optimization of a power augmented S-type vertical axis wind turbine

An axial symmetry augmented vertical axis wind turbine, which is suitable for arbitrary wind directions, is proposed in this paper. In order to improve the power generation ability of the S-type vertical axis wind turbine, a set of so-called “collection-shield boards” are installed symmetrically around the rotating S-type rotor. The flow fields around this type of wind turbine are numerically simulated with the aid of CFD method. The optimized design of geometrical parameters of the rotor and collection-shield boards is conducted by using the orthogonal design method. The obtained results suggest that the power output of the optimized augmented wind turbine can reach nearly three times higher than that of the conventional S-type vertical axis wind turbine.     

Maximising the net social benefit of the construction of post‐disaster alternative housing projects

The widespread destruction that follows large‐scale natural disasters, such as Hurricane Katrina in August 2005, challenges the efficacy of traditional temporary housing methods in providing adequate solutions to housing needs. Recognising these housing challenges, the Congress of the United States allocated, in 2006, USD 400 million to the Department of Homeland Security to support Alternative Housing Pilot Programs, which are intended to explore the possibilities of providing permanent and affordable housing to displaced families instead of traditional temporary housing. This paper presents a new methodology and optimisation model to identify the optimal configurations of post‐shelter housing arrangements to maximise the overall net socioeconomic benefit. The model is capable of quantifying and optimising the impacts of substituting temporary housing with alternative housing on the social and economic welfare of displaced families as well as the required additional costs of doing so. An application example is presented to illustrate the use of the model and its capabilities.     

Assessing the impact of household participation on satisfaction and safe design in humanitarian shelter projects

Participation has long been considered important for post‐disaster recovery. Establishing what constitutes participation in post‐disaster shelter projects, however, has remained elusive, and the links between different types of participation and shelter programme outcomes are not well understood. Furthermore, recent case studies suggest that misguided participation strategies may be to blame for failures. This study analysed 19 shelter projects implemented in the Philippines following Typhoon Haiyan in November 2013 to identify the forms of participation employed. Using fuzzy‐set qualitative comparative analysis, it assessed how household participation in the planning, design, and construction phases of shelter reconstruction led to outcomes of household satisfaction and safe shelter design. Participation was operationalised via eight central project tasks, revealing that the involvement of households in the early planning stages of projects and in construction activities were important for satisfaction and design outcomes, whereas engagement during the design phase of projects had little impact on the selected outcomes.     

Effects and success factors of sustainable consumption policy instruments: a comparative assessment across Europe

Important knowledge gaps exist regarding the effects of policy instruments for sustainable consumption (SC) and success factors of such instruments. This article compares and summarizes the results of six case studies on the effects and success factors of SC instruments in the need areas of housing and food. While analysing different instrument types from four different European countries, all case studies were guided by the same analytical framework and mixed-methods approach. This synthesis article particularly emphasizes factors fostering the generation of instrument effects (outcomes and impacts) or hampering the creation of such effects, respectively. These factors include instrument goals and design, the accommodation of consumer needs, and the simultaneous addressing of framework conditions, as well as market context, policy interaction, and stakeholder involvement. The findings and conclusions can contribute to a better understanding of the conditions under which policy instruments can steer consumer behaviour towards sustainability.     

Evidence of the impacts of the national housing programme on the accessibility of the low‐income population in Rio de Janeiro

The Brazilian shift from a primarily rural to a more urban society has created major challenges that public policies must address. One of the most relevant challenges is deep social exclusion in urban areas, especially in terms of adequate housing and access to urban opportunities (e.g., jobs, housing, and services). In this context, land use and transport planning play a critical role in the sustainable development agenda. The work presented here analyses the accessibility of low‐income dwellings licenced under the Brazilian housing programme to the low‐income population. To evaluate the accessibility of the programme's target population, a case study was conducted in the city of Rio de Janeiro, where 58,000 homes licensed under the programme were analysed using GIS tools in terms of the present public transport network and the location of the homes. The amount of time it takes to access public transport on foot and the homes’ locations in relation to major urban opportunities were also analysed. Finally, the same analysis was performed for the future transport network, and the results of the two analyses were compared to identify the scope of the legacy generated by investments in preparation for the 2016 network.     

Social disruption,mine closure and housing policy: evidence from the Free State Goldfields,South Africa

The creation of mine settlements became a common practice between 1950 and 1980. These mining towns were seen as places of permanent settlement. This permanency, together with the privatisation of mine‐owned houses (mid‐1980s) increased place attachment. Mine decline thus brought with it some form of social disruption. Whereas mining companies in Australia have attempted to minimise the social disruption caused by mine closure by introducing fly‐in‐fly‐out arrangements, the post‐apartheid housing policy in South Africa has focused on asset building in mining areas. We completed 180 interviews with representatives of households. The survey formed part of a panel survey and further included a control group and 15 qualitative interviews. Our results indicate that though members of the mining community have housing units that are larger than those of the control group, incomes are lower in the mining community, real income is in decline, smaller numbers of household members are contributing to income, self‐assessments of wealth are characterised by lower ratings, household assets increase at a slower pace, and there is a stronger preference to continue to reside in the area. All of the above serves to illustrate the consequences of the asset‐based strategies embedded in South African housing policy. The social disruption associated with mine closure further tends to lock households into locations, and thus inhibits mobility.     

Residential satisfaction in students' housing

This paper reports the results of a study of residential satisfaction in students' housing in Nigeria. The study examined how satisfied students were and the factors which predicted residential satisfaction. Specifically, it examined whether the morphological configurations of the halls of residence would predict residential satisfaction. Data were obtained from questionnaires distributed to a sample of 1124 respondents from all the halls of residences in four residential universities in Southwestern Nigeria. The data comprised objective and subjective measures of the physical, social and management attributes of the halls of residence. These were analyzed using frequencies, factor analysis and categorical regression models. More than half (53%) of the respondents were dissatisfied with their residences and the variables which explained satisfaction were the social qualities of the residences, especially, the social densities; the kitchenette, bathroom and storage facilities and some demographic characteristics of the students. The morphological configuration of the halls of residence was also found to be a predictor of satisfaction and the characteristics which appeared most significant were the plan form and the length of the corridor. The regression model explained 65% of the variance in R². An instructive finding was that satisfaction appeared most critical in the bedroom.     

基于目标距离法的工业化住宅环境影响评价

为了客观衡量住宅产业化对建筑业节能减排和降低环境污染的贡献,同时明确住宅工业化建造模式较传统建造模式在环境影响方面的优势及需要改进的环节,选择具有代表性的工业化住宅和传统住宅作为测评对象,从全寿命周期角度,基于目标距离法,根据北京市“十二五”时期各项规划中制定的与住宅建设相关的节能减排和绿色发展目标,建立了基于北京市环境政策的目标距离法评价模型,对比分析了“十二五”时期规划面积的住宅分别采用工业化建造模式和传统建造模式对实现北京市“十二五”环境影响政策目标的作用,得出了工业化住宅较传统住宅在降低资源消耗、生态破坏和健康损害3个方面的优势.     

城市居住小区交通噪声总体评价与防治对策研究

根据实测所得交通流量和车型分布。采用预测为主、实测为辅的方法对典型居住小区进行了交通噪声预测。应用噪声冲击指数法对小区交通噪声进行总体评价。在分析小区交通噪声的时间分布特征和空间差异的基础上。提出小区噪声环境的防治对策。并对减噪措施的效率进行了计算和评价。